Multi-size Control of Homogeneous Explosives by Coaxial Microfluidics

The particle size and particle size distribution of explosive have a great influence on their detonation performance and application. In order to achieve the multi-size preparation of homogeneous explosives, a coaxial microfluidics platform was proposed. As the guidance for designing experiments, the model of crystallization under microscale flow state was proposed by theoretical analysis. Besides, the flow characteristics of coaxial microfluidics got investigated by experimental verification. Herein, HNS (2,2′,4,4′,6,6′hexanitrostibene) was used to verify the applicability of the platform, which was prepared under different flow rates and the flow rate ratio R. It was found that HNS samples with homogeneity and different particle sizes can be prepared by coaxial microfluidics. Furthermore, a size control model of HNS by coaxial microfluidics was established based on experimental data. This study demonstrates an efficient, safe strategy to realize the size- and uniformity-controllable preparation of explosives.